What Is GHK Cu? How It Works in Research and Quality Signals GHK Cu is one of the most talked about peptides in aesthetics right now. But how much of what you have heard about it is actually true? Copper peptide, known as GHK Cu, has GHK Cu Youthful Skin, Healthy Cells, Vibrant You. GHK Cu Peptide: What It Does for Body Composition and Metabolic Health GHK Cu Peptide: Hair Regrowth for Thinning & Alopecia